Precision in Every Turn, Reliable Sealing Every Time — JUNCAUTO Capping Machine Solution
Release Time：
2026-07-20 15:45
Capping Machine Principle and Applications
A capping machine is an automated system designed for the sealing process of bottled products, widely used in industries such as beverages, pharmaceuticals, cosmetics, and liquid chemicals. It automatically positions, grips, and tightens caps onto bottles with precise torque control, ensuring fast, stable, and consistent sealing performance.
The capping machine is capable of handling various bottle shapes and sizes, including round bottles, square bottles, oval bottles, and irregular-shaped bottles such as gourd-shaped or conical bottles.
Capping Machine Working Process
1. Bottle Conveying
Bottles are continuously transported to the capping station through a conveyor belt, vibratory bowl feeder, or other feeding mechanisms.
2. Cap Feeding
Caps are automatically sorted and supplied to the bottle position through a hopper combined with vibration or rotary feeding mechanisms.
3. Cap Positioning
When the cap reaches the bottle mouth, guide rails and positioning fixtures ensure accurate alignment between the cap and the bottle.
4. Capping Operation
- Cap Gripping:
The capping head moves downward and securely grips the cap.
- Rotary Sealing:
The capping head rotates according to preset speed and torque parameters, tightening the cap onto the bottle. During this process, the system automatically adjusts the applied force to prevent over-tightening or insufficient tightening, ensuring optimal sealing quality.
5. Torque Control
The capping machine is equipped with a torque control system to monitor and regulate the tightening torque, ensuring every bottle meets the required sealing standards.
6. Quality Inspection
- Torque Inspection:
After capping, the system checks whether the torque value meets the preset standard. If the value is outside the range, an alarm will be triggered. - Vision Inspection:
With an integrated vision inspection system, the machine can verify whether the cap is properly tightened and correctly positioned.
7. Bottle Output
After the capping process is completed, bottles are transported to the next production stage or packaging process through the conveyor system.
JUNCAUTO Automation Solution
The control system adopts JUNCAUTO JH2M Series EtherCAT Motion Control PLC combined with a TM070E HMI.
The capping machine consists of 7 EtherCAT servo axes and 2 frequency inverters. The capping motion is precisely controlled through an electronic cam function.
The system utilizes JUNCAUTO's independently developed CAM instruction to achieve synchronized tracking control. The conveyor belt works as the master axis, while the horizontal movement axis operates as the slave axis, enabling real-time material tracking and synchronized capping operations.
Based on the predefined cam motion profile, when the conveyor axis and the horizontal axis enter the synchronization zone, the capping action is automatically executed.
A key advantage of this machine is its three-head capping design, allowing three bottles to be capped simultaneously. This parallel operation significantly increases production capacity, reduces processing time per bottle, and improves overall efficiency.
On-site Application
Click the video below to learn more about the "Capping Machine Automation Solution".
Three Core Advantages
1. High-Precision Synchronization
The electronic cam function enables high-precision motion synchronization between multiple axes, such as conveyor belts and horizontal movement axes.
This ensures accurate cap positioning and consistent sealing performance, achieving a 100% successful capping rate.
2. Flexible Motion Control
The EtherCAT-based PLC system provides flexible programming and configuration capabilities.
No XML file import or complicated PDO configuration is required. Simply connect the servo drives through an Ethernet cable, and the system can quickly establish communication.
Pulse-controlled axes and EtherCAT servo axes use the same motion instructions, making system expansion and commissioning easier.
3. Increased Production Speed
Precise multi-axis synchronization allows multiple working stations to operate simultaneously.
For example, the three-head capping system can tighten three bottles at the same time, greatly increasing production efficiency and production capacity.
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